PRACTICAL PERIPHERALS, INC.
===========================

   PC144MT II/MC144MT II

   Modem Type             Data (synchronous/asynchronous)/Fax     
   Maximum Data Rate      14.4Kbps                                
   Maximum Fax Rate       14.4Kbps                                
   Data Bus               External                                
   Fax Class              Class I & II                            
   Data Modulation        Bell 103A/212A                          
   Protocol                                                       
                          ITU-T V.21, V.22, V.22bis, V.32,        
                          V.32bis                                 
   Fax Modulation         ITU-T V.17, V.27ter, V.29               
   Protocol               
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 

<gopher://bitreich.org/I/th99/t/P-R/51136-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose     | Location |      Purpose       | Location |
   |-----------------+----------+--------------------+----------|
   | Line in         |   CN1    | RS-232/422         |   CN4    |
   |-----------------+----------+--------------------+----------|
   | Line out        |   CN2    | Power switch       |   SW1    |
   |-----------------+----------+--------------------+----------|
   | DC Power        |   CN3    |                    |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color |  Status  |             Condition             |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |    On    |        Auto-answer enabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |   Off    |       Auto-answer disabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  | Blinking |          Line is ringing          |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  |    On    |      Modem is receiving data      |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  |   Off    |    Modem is not receiving data    |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  |    On    |    Modem is transmitting data     |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  |   Off    |  Modem is not transmitting data   |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |    On    |      Carrier signal detected      |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |   Off    |    Carrier signal not detected    |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  | Blinking |        Modem is retraining        |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |    On    |         Modem is off-hook         |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |   Off    |         Modem is on-hook          |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |    On    |   Modem connected at 4800bps or   |
   |     |       |          |              faster               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |   Off    |   Modem connected at less than    |
   |     |       |          |              4800bps              |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |    On    |        DTR signal is high         |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |   Off    |         DTR signal is low         |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |    On    |             Power on              |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |   Off    |             Power off             |
   +------------------------------------------------------------+

                      Proprietary Command Set

   +------------------------------------------------------------+
   |                    COMMAND SET DISABLE                     |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %DUMBn [cmds]                     |
   |--------------+---------------------------------------------|
   | Example:     | AT %DUMB0 &W<CR>                            |
   |--------------+---------------------------------------------|
   | Description: | Stops modem from responding to commands.    |
   |--------------+---------------------------------------------|
   | Command      |                  Function                   |
   |--------------+---------------------------------------------|
   |>> %DUMB0     | Command set enabled.                        |
   |--------------+---------------------------------------------|
   | %DUMB1       | Command set disabled.                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           REDIAL                           |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] DL                                |
   |--------------+---------------------------------------------|
   | Example:     | AT M0 DL<CR>                                |
   |--------------+---------------------------------------------|
   | Description: | Redials the last number called.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     REPORT INFORMATION                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] In [cmds]                         |
   |--------------+---------------------------------------------|
   | Example:     | AT IO<CR>                                   |
   |--------------+---------------------------------------------|
   | Description: | Commands modem to display information       |
   |              | requested.                                  |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |      I0      | Reports modem model and speed.              |
   |--------------+---------------------------------------------|
   |      I1      | Reports checksum number.                    |
   |--------------+---------------------------------------------|
   |      I2      | Reports checksum result.                    |
   |--------------+---------------------------------------------|
   |      I3      | Reports firmware version.                   |
   |--------------+---------------------------------------------|
   |      I4      | Reports current command settings.           |
   +------------------------------------------------------------+